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Finding the Fourth Proportional to 3,951.81, 5,928.60 and 1,319.45

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Solution

The fourth proportional to 3,951.81, 5,928.60 and 1,319.45 is: 1,979.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.81 : 5,928.60 = 1,319.45 : x
  2. Step 2: Convert to fraction form
    3,951.81/5,928.60 = 1,319.45/x
  3. Step 3: Cross multiply
    3,951.81x = 5,928.60 × 1,319.45
  4. Step 4: Simplify right side
    3,951.81x = 7,822,461.63
  5. Step 5: Solve for x
    x = 7,822,461.63/3,951.81
  6. Step 6: Final answer
    x = 1,979.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.